527 Commits
Author SHA1 Message Date
bvandeusen 955a61194e fix(library): a fully-missing album leaves the year axis too — #2702
test-go / test (push) Successful in 54s
test-go / integration (push) Successful in 5m59s
Filed as a product decision, but the code had already made it: the genre
queries filter tracks.missing_since inside their EXISTS, so an album
whose every file had gone was ALREADY absent from genre while still
listed under its year — where opening it found nothing playable. The two
browse axes disagreed, and whichever answer won, one of them had to
change.

Hiding is the answer. Browsing is how you go looking for something to
play, and the rule for that case is to take it out of view; the admin
missing-files surface is where absence gets reported, with far more
detail than a silent gap in a grid. It also means changing the axis that
was inconsistent rather than the one that was already right.

All three year queries move together — index, list and count. That is
the invariant #367 needed care for at the genre level: if the index
groups differently from the filter, a year leads to an empty page, and
if the count disagrees with the list then "Load more" promises rows that
never arrive.

The predicate is "has at least one playable track", which also excludes
an album carrying no tracks at all. Same answer for the same reason —
nothing to play, nothing to browse to — and it is what genre has always
done, since an album with no tracks contributes no genres either.

That last part changed two existing tests, which had been seeding
trackless albums as a convenience. Their intent (undated albums never
appear in a range) is untouched; they now seed a track each, which is
what a real album looks like anyway. Two new tests pin the actual
behaviour: a fully-missing album leaves the axis while a half-missing
one stays, and the count agrees with the filtered list.
2026-08-17 13:38:08 -04:00
bvandeusen 7ba673ed83 fix(library): tell clients when a file goes missing or comes back — #2704
test-go / test (push) Successful in 53s
test-go / integration (push) Successful in 5m2s
The wire field shipped in 366692a1 was inert. MarkTracksMissing and
ClearTracksMissing are plain UPDATEs, and /api/library/sync is a
change-log feed: a row that never produces a change row is never
re-sent. Clients would have kept their stale copy until an unrelated
edit touched the track or the cursor fell out of the retention window
and forced a full resync -- so the flag existed and nothing ever told
anyone to read it.

Found by checking the consumer set rather than the code: the field was
threaded end to end and every test passed, because none of them asked
the question "how does this reach a client?".

Logged BEFORE the mutation, which is the opposite of the scanner's
log-after-success pattern, and deliberately so. The failure modes are
not symmetric. Log-then-fail-to-mark makes clients re-read a track that
has not changed: one wasted fetch. Mark-then-fail-to-log leaves the mark
with no change row -- and because both statements are idempotent
(missing_since IS NULL / IS NOT NULL guards), the next scan will not
retry the pair, so the client never learns. Permanently. A spurious
re-read is much the cheaper mistake.

Restoring logs too. A file coming back that nobody is told about stays
greyed out on every device until something unrelated touches it, which
would be a worse bug than the one being fixed.

Op is upsert, not delete: the track still exists and keeps its history.
Delete would tell clients to drop the row, which is precisely the design
#2704 rejected when it chose to ship state instead of filtering the feed.

Adds sync.LogChanges alongside LogChange, backed by an unnest batch
insert. Every existing caller mutates one entity, so per-row was right
for them; reconcile can mark a quarter of a library in one sweep, where
a loop would be thousands of round-trips inside an already-slow scan.
2026-08-17 13:04:14 -04:00
bvandeusen 366692a1fc fix: stop the sync feed hiding missing files from clients — #2704
test-go / test (push) Successful in 2m3s
test-go / integration (push) Successful in 5m8s
android / Build + lint + test (push) Failing after 4m24s
#2523 filtered missing tracks out of every path that CHOOSES music, but
the client sync feed was never touched: GetTracksByIDs has no filter and
the wire had no field for it. So every Android client held a cached
library containing tracks whose files are gone, with no way to tell, and
could queue them from any cache-first path -- the exact failure #2523
existed to prevent, reached by a different route.

Ships the state rather than filtering the feed, of the two options the
ticket weighed. A missing file is expected to come back: the scanner
clears the mark, and adopts the row if it returns renamed (#2528).
Withholding the row would mean a delete-and-recreate on every client for
what is usually a transient unmount, churning caches and throwing away
the identity #2528 works to preserve.

Room goes to v8. No hand-written migration: the pre-v1 destructive
fallback rebuilds from sync, which repopulates every row with the new
column -- exactly the case that policy exists for.

The interesting part was working out what "missing" means to a client,
and it is NOT "unplayable". Two findings shaped the fix:

Server search and album detail never filtered missing tracks either, and
that turns out to be right rather than an oversight. The consistent rule
the codebase already follows is that Minstrel never PICKS a missing
track for you -- recommendation, discover, mixes and browse all exclude
them -- but it does not hide one you went looking for by name or opened
an album to find. Hiding track 4 makes an album look wrong. So the fix
is to mark and to keep it out of queues, not to hide it.

And a track whose server file is missing still plays perfectly if its
audio is already in the device cache. ShuffleSource's offline pools
filter to exactly those residents, so it now clears the mark on the way
out: the bytes are local and the server's loss is irrelevant. Without
that, the queue filter below would have thrown away tracks that work,
turning a fix into an offline regression.

The queue protection is one choke point rather than five call sites.
setQueue is where playlists, album play-all, search, radio and cold-boot
resume all converge. dropUnavailable is pure so the index arithmetic is
pinned by tests -- removing entries ahead of the requested position
would otherwise start playback on the wrong track, and asking to start
on a missing track now starts the next playable one, which is the
"gets skipped" behaviour the operator asked for. An entirely missing
queue returns empty and the caller leaves the player alone rather than
replacing what is playing with silence.
2026-08-17 12:56:31 -04:00
bvandeusen 414dfb23b6 feat: show what re-acquisition has done, per folder — #2527
test-web / test (push) Failing after 42s
test-go / test (push) Successful in 1m0s
test-go / integration (push) Successful in 5m3s
Completes milestone #290. The sweeper has been running and the settings
have been editable, but the list itself said nothing about either, so
the only way to tell "not tried yet" from "asked twice and nothing came
back" was to go and read the Requests queue.

Each folder now carries its album's attempt record: how many times, when
last, when next -- or that it gave up, with the reassurance that a file
coming back and going missing later starts the process over. Null when
nothing has been attempted, which is the common case for a folder that
just went missing and would be noise on every row.

next_attempt_at is computed, not stored. The schedule is a function of
the attempt count and the current settings, so persisting it would go
stale the moment an operator edited the backoff -- and the card lets
them do exactly that.

Needed a forward-looking formatter. relativeTime deliberately collapses
a future timestamp to "just now" (pinned by its own test) because that
is the right answer for a clock-skewed past event; it is the wrong one
for a scheduled future attempt, which would have rendered "next just
now". timeUntil is its companion rather than a sign-aware rewrite: the
two read differently in the same sentence -- "last tried 3d ago, next in
4h" -- and a test asserts they disagree about the future on purpose, so
nobody later "fixes" the divergence.

The state lookup is one batched query for the whole page and best-effort:
this is context on a list whose real job is showing what is missing, so
a failure leaves the groups bare rather than failing the page. The
settings service is read with a nil guard falling back to the shipped
defaults, since contexts that wire routing without services exist and a
backoff projection is not worth a nil-pointer panic (rule #48).
2026-08-17 00:19:48 -04:00
bvandeusen c2862e97bd test(api): cover the missing-file admin routes in the Mount test — #2527
test-go / integration (push) Successful in 5m3s
test-go / test (push) Successful in 57s
go vet caught the Mount signature change: library_test.go calls it from
inside the package, so the earlier grep for "api.Mount(" missed it.

Rather than only appending the argument, the route table now includes
both admin surfaces from this arc. That test exists to prove every route
is actually registered — a 404 there means the route is missing — and
the two paths added today had no such coverage. Both are in the admin
group, so reaching the 401 is what proves they are wired.

The new service is passed as nil, matching the other optional services
in this call: the test asserts routing, never executes an admin handler,
and constructing a settings service would need a pool round-trip for
nothing.
2026-08-17 00:07:10 -04:00
bvandeusen 30a5ac56ce feat(api): admin endpoints for the re-acquisition policy — #2527
test-go / test (push) Failing after 46s
test-go / integration (push) Canceled after 4m20s
GET/PUT /api/admin/library/reacquisition, so every knob the sweeper
reads is editable without a restart (rule #25). Routed under /library
beside the missing-files list it governs rather than under /lidarr:
Lidarr is the mechanism, but missing files are the problem the operator
came to solve, and that is the surface they meet it on.

The payload carries one thing the settings table doesn't: the count of
albums with missing files that can never be auto-requested, because
neither they nor their artist has an MBID. Nothing can be asked of
Lidarr for a release MusicBrainz cannot name, and a feature that
silently does nothing for part of its input reads as broken -- so the
card states the number instead of leaving it to be inferred. Counted
best-effort: the settings are the point of the endpoint, and failing the
whole card because a count query hiccuped would be the wrong trade.

Range errors come back as 400 naming the field. The Go-side validation
mirrors migration 0056's CHECKs precisely so the operator reads
"grace_hours must be 1-720" rather than a constraint-violation string
surfacing as a 500.
2026-08-17 00:02:41 -04:00
bvandeusen bab9b16831 feat(library): a missing file asks Lidarr for itself, on a backoff — #2527
test-go / test (push) Successful in 1m10s
test-go / integration (push) Successful in 5m56s
Answers the open fork on #2527's last slice: automatic, not a button.
Until now missing_since was a dead end -- reconcile marks it, every
selection path skips it, the admin surface lists it, and there it sits.

Two decisions carry most of the safety, both at the design level rather
than as rate limits bolted on afterwards.

The unit is the ALBUM, not the track. Lidarr acquires releases; there is
no meaningful "fetch me one track", and a track-kind request needs a
recording MBID plenty of files lack. Grouping means the loss that
produced #2523 -- three reorganised albums, ~40 missing files -- becomes
three requests instead of forty. The flood problem mostly dissolves.

And nothing is requested until a file has been missing longer than the
grace window (24h default). A filesystem lies transiently: an unmounted
volume, a container that started before its media mount attached, a NAS
mid-reboot. Every one of those resolves itself well inside a day at no
cost. missing_since is never re-stamped (#2523), so it is a true "gone
since" clock to measure against, not "when we last noticed". This is
the difference between automatic and trigger-happy.

Then the backoff proper: 6h -> 12h -> 24h -> 48h per album, clamped to a
week, three attempts before giving up, and a per-pass ceiling so a
genuinely large loss trickles instead of dumping hundreds of rows into
the queue. Giving up is stamped as a timestamp rather than inferred from
attempts >= max, so the verdict survives an operator later raising the
maximum and the surface can say when.

A sweeper, not a hook inside reconcile. Reconcile runs inside a scan and
has no business deciding to talk to a third-party service; it also
re-runs often, which would make "attempt once, then back off" awkward to
express. A worker paces itself, survives a restart, and retries without
needing another scan. Recovered albums have their state deleted rather
than reset -- a future loss is a new problem, not a continuation.

Requests are attributed to the oldest admin: lidarr_requests.user_id is
NOT NULL and a re-acquisition has no requesting human, so this keeps the
row auditable and in the same queue as everything else without inventing
a synthetic principal the schema would have to understand.

Auto-approve defaults ON. Requests are created pending and nothing
reaches Lidarr until approval, so with it off this would be a
notification rather than an attempt. Lidarr disabled leaves the request
pending rather than counting a failure -- the record of intent is still
right and becomes actionable the moment Lidarr is configured.

Albums with no MBID are counted, not silently skipped: nothing can be
asked of Lidarr for a release MusicBrainz cannot name, and quietly doing
nothing would read as the feature being broken.

Settings are DB-backed per rule #25 with CHECK-guarded ranges, validated
in Go as well so the API answers 400 rather than surfacing a constraint
violation. The admin card and the state on the missing-files page are
next; this is the engine.
2026-08-16 23:53:21 -04:00
bvandeusen 03a8d12079 docs: stop pointing at the deleted Flutter tree — #2710
test-go / test (push) Successful in 2m5s
android / Build + lint + test (push) Successful in 4m40s
test-go / integration (push) Successful in 5m10s
Every comment naming a path in flutter_client/ now resolves to nothing,
which is the failure mode this project has already been bitten by twice
-- drift #572 came from delete.go describing behaviour it no longer had,
and that same docstring was still wrong when it was fixed last week. A
pointer to a deleted directory is the same thing in slower motion: the
reader follows it, finds nothing, and cannot tell whether the comment is
stale or they are looking in the wrong place.

Three treatments, per what each comment was actually doing:

  - Naming a concept ("mirrors db.dart's CachedTracks Drift table"):
    keep the concept, drop the path. The Drift table is why the entity
    looks as it does; the file it lived in is not.
  - Pure port bookkeeping ("Mirrors <path>." and nothing else): deleted.
    Git history records the port; the comment only restated it.
  - Substance introduced by a pointer (a lifecycle list, a 200 px/s
    threshold, an inverted control-row placement): keep the substance,
    drop the lead-in.

The two Go comments were the valuable ones and got more than a trim.
They stated a live contract -- "field names match the client's FromJson
helpers exactly, or fields are silently dropped" -- against a client
that no longer exists. They now name the real consumer,
SyncResponseWire.kt, and say why the failure is silent there too:
kotlinx.serialization skips unknown keys, so a renamed field arrives as
a default value rather than an error.

The ticket counted 64 files by grepping flutter_client/. A second tier
turned up during the sweep: 15 more references naming bare Dart files
(player_bar.dart, now_playing_screen.dart:464, auth_provider.dart) with
no directory prefix. Same dead tree, same treatment, folded in here.

Comments only -- verified no non-comment line is touched in the diff.
2026-08-16 22:40:58 -04:00
bvandeusen 4dd0a58d63 feat(api): admin surface for files the library has lost — #2527
test-go / test (push) Successful in 52s
test-go / integration (push) Successful in 5m21s
The scan has marked missing files since f6d1cf24 and every selection
path filters them out, so they cause no harm -- and are invisible. The
operator found out about the first batch only because an unrelated MBID
backfill logged "no such file or directory" forty times.

GET /api/admin/library/missing reports them, grouped by directory. The
grouping is the whole ergonomic argument: the case that produced #2523
was three reorganised albums, which a flat list renders as forty
unrelated problems and a folder list renders as three decisions.
ListMissingTracks orders by directory so the handler can fold runs
without a map, which also keeps the query's ordering instead of Go's
random map iteration.

Each row carries last_played_at, nullable, because "gone six months,
never played" and "gone yesterday, played 200 times" deserve opposite
reactions and a file path tells you neither. The correlated MAX needs
its ::timestamptz cast or sqlc infers interface{} and the Go layer
loses the type.

Read-only, deliberately. Nothing here deletes: a missing file keeps its
row, its play history and its likes because it may come back, and if it
comes back renamed the scanner adopts it (#2528). The route sits under
/library rather than /tracks so it can't be confused with the
destructive DELETE /admin/tracks/{id} beside it.
2026-08-16 11:48:45 -04:00
bvandeusen c3f3a17c6d feat(library): a missing file stays in the playlist, greyed and unplayable — #2527
test-go / test (push) Successful in 59s
test-go / integration (push) Successful in 4m49s
Every browse, discover and mix query filters missing_since, so a track
whose file vanished disappears from the places Minstrel chooses music.
A playlist is different: the entry is there because the user put it
there, and silently dropping it rewrites their list behind their back.

So playlists keep the row and mark it instead. ListPlaylistTracks now
carries missing_since (still deliberately unfiltered), the service
layer surfaces it as PlaylistTrack.Unavailable, and the wire gains
"unavailable" on each entry.

A missing entry also loses its stream_url. Refusing to hand out a URL
that cannot serve is stronger than trusting every client to honour the
flag, and "stream_url": null is a shape the clients already model --
PlaylistWire.streamUrl is documented nullable for the track-removed
case -- so an older build degrades to "present but not playable" with
no change.

Nothing is deleted here and nothing should be: the row, its play
history, its likes and its taste contribution all survive a file going
missing, because the file may come back (and #2528 will adopt it if it
comes back renamed).

Also corrects two comments that had drifted into lying. delete.go still
claimed the file-gone case was NOT auto-reconciled and told admins to
delete rows by hand -- untrue since f6d1cf24, and that exact staleness
is what produced drift #572. It now says what DeleteTrackFile really is:
the destructive admin action, which CASCADEs play_events and likes, and
is emphatically not the missing-file path. watcher.go claimed the
safety-net scan "covers anything missed"; the walk only covers
additions, and it is reconcile that covers removals.
2026-08-16 11:43:05 -04:00
bvandeusen 8e1d25a772 fix(scanner): repair acronym and apostrophe casing on genre tags — #2468
test-go / test (push) Successful in 53s
test-go / integration (push) Successful in 5m2s
Operator decision: keep the ID3v1 table canonical, fix the casing.

The operator's library carries "Edm", "Idm", "Aor", "Uk Garage", "Uk
Hardcore", "Trap Edm", "Glitch Hop Edm" and "Children'S Music" — an external
tag editor title-cased the whole genre field. The "'S" is the giveaway.

Fixed at SCAN time, not in the display layer: taste_profile.sql reads
tracks.genre directly, so a cosmetic-only fix would leave the taste
vocabulary holding "Edm" while the UI showed "EDM", and any correctly
tagged file would contribute a second, separate tag.

trueUpCasing only ever changes case, never letters, so it cannot silently
turn one genre into a different one — that is what separates it from the
label-remapping idea this task rejected. Two narrow rules:

- A short, evidence-led acronym list, matched case-insensitively so "edm",
  "Edm" and "EDM" all land on "EDM". This is a deliberate exception to the
  project's rule that genre case is exposed as the file says it: "Rock" and
  "rock" still stay separate rows, because folding those is a judgement about
  labels, whereas there is no genre named "Edm".
- Apostrophe suffixes from a FIXED contraction list, so "Children'S" is
  repaired while "O'Brien" and "D'Angelo" keep their capital. A blanket
  "lowercase after an apostrophe" would have broken both.

Matching uses the word's letter core rather than the raw word, so "(Edm)"
and "Edm," are repaired and their punctuation re-attached. Interior
punctuation stays in the core, so "Lo-Fi" and "R&B" are compared whole and
cannot match a fragment by accident. My first version missed this and a test
expecting "(Live EDM)" caught it.

Names resolved from the ID3v1 table are deliberately NOT re-cased, per the
operator's call — entry 40's "AlternRock" stays as the table spells it, with
a test pinning that so a later tidy-up doesn't quietly "fix" it.

tagReadVersion 1 -> 2, so this reaches the existing library on the next scan
rather than new files only. That re-read reuses stored durations, so it costs
tag reads and no ffprobe.
2026-08-07 14:43:36 -04:00
bvandeusen 481f906059 feat(metrics): publish margin of error on every delta — #2495, #2524
test-web / test (push) Failing after 43s
test-go / test (push) Successful in 1m0s
test-go / integration (push) Successful in 4m58s
The metrics card had one volume threshold doing two jobs.
recMetricsLowVolume = 20 is a DISPLAY floor — below that a skip rate is
anecdote — but the card then presented deltas as though it were also a
DECISION floor. Those differ by an order of magnitude: detecting the ~13pp
differences that matter needs ~133 plays per arm for 80% power at a=0.05.

So Discover's taste-matched (59 plays) and random-unheard (70) both rendered
as full-confidence rows with a bold delta beside them, and that comparison
sits at p ~ 0.06. The card said "signal"; the arithmetic said "maybe". It
produced a recommendation the data didn't support, and any reader with the
same numbers would have made the same call.

Deltas now carry a 95% margin of error and a `distinguishable` flag, computed
server-side so both clients read the same arithmetic instead of each
re-deriving it. Skip rate is a two-proportion difference; completion is
Welch, which needs a variance — hence completion_sqsum in the query. It is
the sum of squares rather than stddev_samp on purpose: raw source rows are
merged into surface families in Go, and sums of squares combine across groups
exactly whereas standard deviations cannot.

recMetricsLowVolume is untouched. "Too thin to show" and "too thin to act on"
are different questions.

Web renders an indistinguishable delta as dimmed and prefixed "≈", with the
range on hover and a legend explaining the glyph. Colour is withheld unless
the delta clears its margin — colouring noise red is what made the old card
misleading. Breakdown rows go through the same path; those are the thinnest
samples on screen and where the old card misled most.

Also fixes the admin trends view, which had the same problem worse: its
"Latest skip"/"Latest completion" columns are one WEEK while the adjacent
Plays column is the whole window. I misread exactly that and briefly
concluded Deep cuts was the worst surface, from ~17 plays in a single week —
over 180 days it is one of the best. Headers now name their period and the
skip cell carries that week's play count.

#2524: resolveArtist now recognises a duplicate-MBID unique violation as the
expected condition it is, matching resolveAlbum. Two rows mapping to one
MusicBrainz artist is a merge candidate, not a fault; without the branch it
logged a generic warning plus a Postgres ERROR line on every scan, which
teaches an operator to ignore database errors.
2026-08-06 21:08:58 -04:00
bvandeusen 24d330424f feat(library): adopt moved files instead of forking their history — #2528
test-go / test (push) Successful in 52s
test-go / integration (push) Successful in 5m0s
Track identity was file_path, so a file that came back renamed or in a
different directory looked like a deletion plus an unrelated new track:
the old row kept the like and every play_event while a fresh zero-history
row appeared, and nothing connected them. A liked song read as unliked, its
play count reset, and Rediscover could offer it as a discovery — silently.
Renumbering an album was enough, which is what happened to the operator's
copy of Minutes to Midnight.

Adoption re-points the existing row's file_path at the new location and
clears its missing mark. The normal UpsertTrack then conflicts on file_path
and updates THAT row, so the track id survives and likes, plays and
playlist memberships travel with it — and clients see an update rather than
a delete-and-create, so no cache churn either.

Matching is MBID first (identifies the recording, so it survives a
re-encode), then file_size + duration_ms for untagged files. Both
fingerprint components must be non-zero: duration_ms is 0 when ffprobe
failed, and matching 0 against 0 would pair up unrelated broken files.
Only rows already marked missing are eligible — a row whose file is present
elsewhere is a duplicate, not a move, and re-pointing it would corrupt the
copy that still exists. An ambiguous match inserts fresh rather than
adopting one arbitrarily: a fork is recoverable later, a wrong merge isn't.

Scan is now three phases, and the order is the point. Adoption can only
claim a row that is ALREADY marked missing, but reconcile previously ran
after processing — so a rename performed while the server was down surfaced
the deletion and the addition in the same scan, the new path inserted first,
and the fork became permanent. Enumeration is therefore separated from
processing so reconcile can run between them: walk (paths only, no tag
reads or probes) -> reconcile -> process in walk order.

Consequence worth knowing: when reconcile refuses (an absent root, or a
reorganisation exceeding the 25% mark cap) adoption cannot fire and renamed
files fork as before. That's the pre-#2528 behaviour rather than a new
failure, and the warning now names it.

The old outer walk-error branch was unreachable — the callback always
returned nil, so WalkDir never surfaced an error — and verifyRootsPresent is
the real protection, so enumerate counts walk errors instead of pretending
to abort on them.
2026-08-06 15:56:07 -04:00
bvandeusen f6d1cf24f0 feat(library): detect missing files and stop offering them — #2523
test-go / test (push) Successful in 1m0s
test-go / integration (push) Successful in 5m10s
Nothing in Minstrel ever noticed a deleted file. The walk only visits
paths that exist, so a row whose file was gone was never scanned, never
errored, never counted — permanently invisible. classifyEvent ignores
fsnotify removals by design, and the safety-net scan is the same walk, so
it covers additions only. Rows accumulated forever.

Found on the operator's library: a completed scan reported
skipped=24185 errored=0 while the MBID backfill (which opens files by DB
path rather than walking) logged ~40 "no such file or directory" across
three reorganised albums. Those rows also kept their pre-#2499 welded
genre, which is how this surfaced — the version-stamped tag re-read can
only reach files the walk visits.

The harm is not cosmetic. tracks is the candidate universe for
recommendation.sql / discover.sql / system_mixes.sql and nothing filtered
on file existence, so a mix could spend a slot on a track that cannot
stream.

Marks rather than deletes. A missing file is a claim about the filesystem
and the filesystem lies transiently — an unmounted volume, a network
blip, a container that started before its media mount attached. Every
sweep in internal/gc resolves a truth INSIDE the database and is safe to
run blind; this one is not, so no deletion happens here. Three guards
refuse to act on ambiguous evidence: every scan root must resolve to a
non-empty directory, the walk must have seen at least one file, and one
reconcile may newly mark at most 25% of the library. Clearing a mark is
never the dangerous direction, so it runs unconditionally — otherwise a
library that tripped the cap could never recover once the mount returned.

Only a full Scan reconciles. The walk's set of seen paths is the
evidence, and ScanFiles has no basis for concluding anything about files
it did not look at.

Excludes marked tracks from all 13 track-emitting queries (radio x2,
system mixes x5, discover x4, most-played x2), the 6 play-history seed
picks, and the genre browse axis. Deliberately NOT filtered: the shared
ListPlaylistTracks read path, because it also serves user-curated
playlists where hiding a track the user added would be wrong — system
playlists shed orphans on their next daily rebuild instead. History and
the taste profile also keep them: those record the past, and a track you
played 200 times still says something about your taste.

Reconcile tallies land in scan_runs so a disappearance is visible rather
than discovered when a mix comes up short.
2026-08-06 14:34:53 -04:00
bvandeusen fd27819cdd style(scanner): tagged switch on ID3 major version — #2499
test-go / test (push) Successful in 55s
test-go / integration (push) Successful in 4m55s
2026-08-05 21:22:53 -04:00
bvandeusen 37b396a7e4 fix(scanner): read multi-value genre frames correctly — #2499
test-go / test (push) Failing after 41s
test-go / integration (push) Canceled after 4m46s
dhowden/tag's readTFrame splits ID3v2 null-separated multi-value text
frames and rejoins them with the EMPTY string, so a file tagged
"Alternative Rock" + "Rock" was stored as "Alternative RockRock". It also
leaves bare numeric ID3v1 references unresolved, which is why the
library showed genres like "4017" and "526617".

This corrupted more than the browse axis added in #367: taste_profile.sql
reads tracks.genre directly, so the welded tokens were entering the taste
profile's tag vocabulary, and recommendation.sql/discover.sql were
comparing them as single opaque tags. Genre counts were wrong everywhere.

ffprobe is not a fix — ffmpeg's read_ttag calls decode_str once with no
loop, keeping only the first value. Truncating multi-genre tags would
blunt the similarity signal genre mainly feeds. So the TCON frame is now
parsed directly (ID3v2.2/2.3/2.4, all four text encodings, per-frame and
tag-level unsynchronisation, numeric and parenthesised ID3v1 references);
everything else still comes from dhowden/tag. Values are stored
";"-delimited, which the read side already splits on, so no query changes.

Existing rows are repaired without an operator-run rebuild: migration
0054 adds tracks.tag_read_version DEFAULT 0, below the scanner's current
tagReadVersion, so the next scan re-reads tags it would otherwise skip on
mtime. Such a re-read reuses the stored duration instead of re-running
ffprobe, keeping a repair pass tag-read-bound rather than one fork+exec
per file. Bumping the constant is how a future extraction fix reaches an
existing library.

Only ID3v2 is in scope — dhowden welds nowhere else. The Vorbis/MP4
repeated-field question is #2500, unproven and deliberately not built.
2026-08-05 21:17:59 -04:00
bvandeusen a9ca49dc4e feat(library): genre + year quick-jumps on album and artist detail — #367
test-web / test (push) Successful in 44s
test-go / test (push) Successful in 1m1s
test-go / integration (push) Successful in 4m59s
Last bullet of #367. From an album you like, one click to everything else from
that year or in that genre.

Year was free — AlbumRef already carried it. Genre was not: AlbumDetail is
AlbumRef + tracks and neither carried genre, because genre lives on TRACKS. So
both detail responses gained a derived `genres` array, computed from the
entity's tracks rather than stored, since an album's tracks can legitimately
disagree about genre.

Split and trimmed identically to the browse index. That's the invariant this
whole task turned on: if the chip's matching diverged from the index's
splitting, a chip would lead to a page that doesn't contain the album you
clicked from.

No year link on artist detail. An artist spans many years, so a single one
would be a lie about the discography — genres only there.

Genre lookup failure is logged and degrades to no chips rather than failing the
request; a navigation nicety must not 404 a detail page that otherwise loaded.
`genres` is always an array at JSON, never null, matching how every other list
field in this package is emitted.

## Type widening, and the TypeScript version of a lesson from earlier today

Adding a required field to AlbumDetail/ArtistDetail breaks every typed fixture
that constructs one. Six of them across three test files. That's the same shape
as the Go signature changes that cost three CI rounds in #2453 — change a type,
then go find everything that builds it — so I searched for the constructions
before pushing instead of after. All six updated.

Tests: the encoded href for a slash-bearing genre ("Rock/Pop" →
?g=Rock%2FPop), the year href, and the no-tags case rendering no chips at all.
gofmt verified clean via docker rather than guessed.
2026-08-05 13:50:29 -04:00
bvandeusen f8f2273aec style: gofmt alignment in library_browse_test — #367
test-go / test (push) Successful in 55s
test-go / integration (push) Successful in 4m58s
One space. `name:` had to align with `query:` inside a composite literal where
both sat on their own lines.

Found via `docker run golang:1.25-alpine gofmt -l`, which is the actual point
of this commit: gofmt is available here the same way sqlc is, and there is no
reason to have let CI discover a formatting nit. Whole tree verified clean, not
just this file.

The substance of 1126bfcf was already sound — verify-generate, vet and the full
integration suite passed, so the genre-splitting behaviour holds against a real
database. Only the formatter objected.
2026-08-05 13:29:28 -04:00
bvandeusen 1126bfcf78 feat(library): genre + year browse queries and endpoints — #367
test-go / test (push) Failing after 46s
test-go / integration (push) Successful in 5m0s
Server half of #367. Web UI follows.

Genres are exposed AS-IS per the operator: split on the delimiter, trimmed,
but no case folding and no synonym mapping. So "Rock" and "rock" appear as
separate rows, as does "Rock/Pop" alongside "Rock" and "Pop". The raw spread
has to be visible before anyone can judge whether it needs normalising, and
the alternative is a mapping table to invent and then maintain.

Trimming is not an exception to that. Splitting "Rock; Pop" yields " Pop", and
showing that as a genre distinct from "Pop" would be a bug in OUR splitting,
not fidelity to the operator's tags.

## The correctness trap this had to avoid

ListAlbumsByGenre compared tracks.genre verbatim, while recommendation.sql and
discover.sql have always split it on [;,]. Building the browse index by
splitting while matching exactly would have listed genres whose pages are
empty — every multi-genre track unreachable from either of its genres.

So ListAlbumsByGenre now splits too. That also fixes Subsonic
getAlbumList?type=byGenre, its only caller, which silently missed every
multi-genre track. Its Genre param went *string → string as a result.

EXISTS rather than JOIN + DISTINCT ON throughout: the lateral split emits one
row per (track, fragment), so a join multiplies rows per album and needs
DISTINCT to undo itself. EXISTS asks the question directly, and the count
query then matches the list query by construction rather than by coincidence.

## Genre is a query parameter, not a path segment

Because "Rock/Pop" is a real ID3 tag — the one the task itself cites — and a
slash cannot survive a path segment: Go normalises %2F and the router would
split the value in two. So filtering rides GET /api/library/albums?genre=,
which also reuses the existing paged album surface instead of adding a
parallel one.

Endpoints:

  GET /api/library/genres                          unpaged index + track counts
  GET /api/library/years                           unpaged index + album counts
  GET /api/library/albums?genre=                   filtered page
  GET /api/library/albums?year_from=&year_to=      filtered page, either edge open

The indexes are unpaged deliberately: a client needs the whole set to render a
browsable picker, and paging would let it show only a prefix of an ordering
the user didn't choose.

Two refusals rather than guesses: genre+year together is a 400 (the UI browses
them as separate axes, and quietly dropping half a filter would report a
narrower result than it returned), and an inverted year range is a 400 rather
than being silently swapped.

Undated albums are absent from the year axis rather than bucketed under 0 —
"unknown" is not a year, and a 0 row would sort to one end of a chronological
list looking like data.

Tests: parseYearFilter is pure and runs in the fast lane. The integration
tests assert the thing that would otherwise be silently broken — that a
"Rock;Pop" track is reachable from BOTH genres, that "Rock/Pop" survives as a
filter value, that fragment whitespace is trimmed, and that undated albums
stay out of every year range. Reused the existing seedAlbum/seedTrackWithGenre
fixtures, which already took exactly the year and genre arguments needed.
2026-08-05 13:22:30 -04:00
bvandeusen 5b36d79ff9 fix(server): access log reports the real client, not the proxy — #2453
test-go / test (push) Successful in 1m3s
test-go / integration (push) Successful in 5m9s
Closes the disagreement left open by #2453: requestlog.go logged raw
r.RemoteAddr while the Active-sessions surface resolved through the operator's
configured proxy depth. Behind a proxy — the normal deployment for anything
public — every access-log line carried the same useless proxy address, and the
two surfaces contradicted each other about who connected. Logs and UI
disagreeing is worse than either being wrong alone, because it costs you trust
in both.

`remote` now holds auth.ClientIP(r, hops). The attribute KEY is deliberately
unchanged so existing log greps keep working; only its accuracy improved.

Wiring note. The access log covers /healthz and the SPA, so it's registered
before the pool-bearing branch that used to build the settings service. Rather
than close over a variable reassigned later — which works, but leaves a
mutable-after-registration seam and an awkward question about races — I hoisted
netsettings.New above the router entirely. It already handles a nil pool by
returning a default-valued service, so no branch is needed and the accessor
stays a plain method value.

Applied the lesson from the last three CI failures BEFORE pushing this time: a
bare-identifier grep for `requestLog(` found three call sites in
requestlog_test.go that a qualified pattern could never have matched, since
the function is package-private and its tests are in-package. Also swept
netsettings.New and ClientIP the same way.

Tests: the behaviour change gets its own table — nil accessor and depth 0 log
the socket peer, depth 1 through a PUBLIC-addressed proxy logs the client
(the exact case the old heuristic got wrong forever), depth 2 reaches through
a CDN. Added `remote` to the required-keys assertion so the attribute can't
quietly disappear.
2026-08-05 13:02:36 -04:00
bvandeusen 11538095be fix(net): validate hop range before checking availability — #2453
test-go / test (push) Successful in 54s
test-go / integration (push) Successful in 5m1s
TestSetHops_RejectsOutOfRange caught a real ordering bug in code I wrote in
the same commit: the nil-pool guard sat ahead of the range check, so
SetHops(-1) on a service with no pool returned "network settings unavailable"
instead of ErrHopsOutOfRange.

Range first is correct, and the distinction is user-visible rather than
cosmetic: the argument is invalid regardless of whether the database is
reachable, and admin_network.go maps ErrHopsOutOfRange to 400 while anything
else becomes 500. The old order blamed the server for the caller's input.

Note this is the first failure in this sequence that wasn't a missed call
site — vet and golangci-lint both passed, and a test asserting a specific
sentinel error found it. Worth the extra assertion; `err != nil` would have
passed happily.
2026-08-05 10:27:10 -04:00
bvandeusen d5ab3b0764 fix(net): update the in-package Mount call site in library_test — #2453
test-go / test (push) Failing after 57s
test-go / integration (push) Failing after 4m57s
Third attempt at the same class of mistake, so worth naming precisely.

TestRoutesRegisteredInMount calls Mount() from INSIDE package api, so the
call reads `Mount(...)` unqualified. My verification grep was `api.Mount(`,
which cannot match it. Same shape as the previous failure, where I grepped
`auth.ClientIP(` and missed nothing — but only because those callers happened
to be in other packages.

The lesson generalises: after changing an exported signature, search for the
bare identifier, not the package-qualified form. In-package callers — which
in Go means most tests — are invisible to the qualified pattern.

This time I swept every signature I touched (Mount, RequireUser, ClientIP,
TouchSessionLastSeen) with an unqualified pattern before pushing, rather than
letting CI enumerate them one per run.

Passing h.netSettings (nil in test handlers) is deliberate, not a placeholder:
this test asserts route registration, and Hops() is nil-safe by design so the
middleware reads "trust nothing" rather than panicking.

Also gave netsettings' logger field a use — it was assigned and never read,
which staticcheck's unused pass can flag. A hop-count change alters how much
of a client-supplied header the server believes, so it earns a log line for
anyone later debugging odd addresses in the sessions list.
2026-08-05 10:21:16 -04:00
bvandeusen a07fb3867a fix(net): thread hops into session creation; disambiguate card tests — #2453
test-web / test (push) Successful in 42s
test-go / test (push) Failing after 43s
test-go / integration (push) Failing after 4m22s
Two CI failures from 381e9ced, both mine.

**Go (vet, which cascaded into the integration job).** Widening
auth.ClientIP to take a hop count, I updated the middleware that TOUCHES a
session but missed the two places that CREATE one — handleLogin and
handleRegister. So `created_ip`, the frozen origin address that the whole
"address changed" comparison rests on, was the one value still being
computed the old way. Both now read h.netSettings.Hops(), which is nil-safe
so test handlers constructed without the service still work.

Worth noting the shape of this miss: I checked call sites by searching for
the middleware's own usage and stopped there, rather than for every caller of
the function whose signature I changed. vet found it in seconds; a grep for
`auth.ClientIP(` would have too.

**Web (vitest).** Three tests waited on `findByText('198.51.100.7')`, which
matches TWO elements in the fixture — the detected client address and the
forwarded chain, identical strings for a single-proxy setup — and findByText
throws on multiple matches. Now they wait on the unique "Your address right
now" label and assert the address with getAllByText where duplication is
legitimate. The duplication is correct behaviour, so the test moved rather
than the component.
2026-08-05 10:14:38 -04:00
bvandeusen 381e9cedb7 feat(net): trusted-proxy depth so real client IPs survive a proxy — #2453
test-go / test (push) Failing after 50s
test-web / test (push) Failing after 50s
test-go / integration (push) Failing after 2m19s
Fixes the defect the operator spotted in #370 immediately after it shipped:
auth.ClientIP ignored X-Forwarded-For whenever RemoteAddr was public, so a
proxy on a public address — a separate host, or a CDN, i.e. anyone running
this publicly, since public means TLS means a proxy — recorded the PROXY for
every session. created_ip and last_ip were then always equal and the
"Address changed" signal could never fire. The feature looked like it worked
and reported nothing.

Replaced with the standard trusted-hop model (Rails, Caddy, Traefik, nginx).
XFF grows left-to-right as each proxy appends the peer it received from, so
for client -> CDN -> own-proxy -> app the app sees [client, CDN] with
RemoteAddr = own-proxy, and the client sits at XFF[len - hops]:

  0  RemoteAddr, XFF ignored — no proxy
  1  the address your own proxy observed
  2  through a CDN in front of your proxy

Default 1, per the operator: publicly reachable means a TLS terminator in
front.

The cost is real and stated rather than hidden. hops >= 1 DECLARES that a
proxy exists; set it with no proxy, or deeper than the actual chain, and the
index reaches attacker-supplied entries, letting a visitor choose which
address their own session shows — defeating exactly the detection #370 is
for. That's inherent to the model, which is why 0 is a first-class value and
the admin card says "count your proxies, don't guess high" instead of just
exposing a number. Both mis-set shapes are pinned by tests so they stay known
consequences rather than surprises.

Migration 0053 + internal/netsettings, cached under an RWMutex. That's not an
optimisation: ClientIP runs in RequireUser for every authenticated request, so
a per-request query would put the database on the critical path of the whole
API. New() always returns a usable service so a boot-time DB hiccup degrades
to the default instead of breaking that path (rule #131), and Hops() is
nil-safe because test routers construct middleware without it.

RequireUser now takes a func() int rather than an int — the value is
operator-editable at runtime while the middleware is built once at boot, and
reading it per request is what makes a save take effect with no restart
(rule #25).

The admin card is verifiable, not just configurable: it reports the address
the CURRENT setting resolves THIS request to, the raw forwarded chain, and the
socket peer — so you set the number, save, and confirm the address matches the
machine you're on. It also counts the arriving chain and says how many proxies
that implies. GET/PUT both return that payload, PUT recomputed under the new
value, so the effect is visible without a reload.

Also fixes styling in the #370 card that CI could not catch: text-destructive
and bg-destructive don't exist in this Tailwind config — the palette is
colors.action.destructive — so the "Address changed" warning and the
sign-out-others button were rendering unstyled. Both now use
text-action-destructive / bg-action-destructive / text-action-fg.

Not done here: requestlog.go still logs raw RemoteAddr and will disagree with
the sessions UI about who connected. Left for its own change.
2026-08-05 10:07:43 -04:00
bvandeusen d86af7397d feat(auth): active sessions API with origin/current IP — #370
test-go / test (push) Successful in 55s
test-go / integration (push) Successful in 4m53s
Server half of the active-sessions surface. Web UI follows.

The operator wants this specifically to notice a compromised account, which
sets the bar: the addresses have to be trustworthy, or the feature is worse
than absent because it looks like evidence.

Migration 0052 adds created_ip + last_ip. Two columns, not one, and the pair
is the signal: a session issued at home and now being used from elsewhere is
the shape of a stolen token, and neither column alone can show that. Typed
text, matching the user_agent column beside it — these are displayed, never
queried by subnet, and inet round-trips through pgx as a netip.Prefix that
renders "1.2.3.4/32".

The rest of the schema was already waiting. Migration 0004 anticipated this
exactly: "last_seen_at enables an 'active sessions' UI later (not wired in
this plan) without schema churn." last_seen_at is live data — the auth
middleware already touches it per request — so last_ip rides that same
UPDATE for free.

Getting the address right is the substance here. Nothing extracted a client
IP anywhere before, and both obvious approaches are wrong:

- RemoteAddr alone shows the reverse proxy on every session, which is the
  normal self-hosted deployment. Noise shaped like data.
- Trusting X-Forwarded-For lets any client choose what its victim sees. A
  security surface an attacker can write to is worse than none.

So auth.ClientIP trusts the header only when the request actually arrived
from a proxy range. Public RemoteAddr means a direct connection, so XFF is
attacker-controlled and ignored outright. Private RemoteAddr means we walk
XFF right-to-left — proxies append, so the right end is what our own
infrastructure wrote — and take the first non-proxy address. A forged XFF
only prepends to the left end, which that walk never reaches. Unit-tested,
including both spoofing shapes.

Fails closed on a public-addressed proxy (separate host, CDN): we report the
proxy rather than trusting a forgeable header. Documented at the function.

Endpoints, all scoped by user_id per rule #47:

  GET    /api/me/sessions                → list, flagging the current row
  DELETE /api/me/sessions/{id}           → 204, or 404 if not yours
  POST   /api/me/sessions/logout-others  → {"revoked": n}

Keyed on session id alone, any household member could revoke another's
session by guessing a uuid, so the delete carries user_id in its WHERE and
:execrows distinguishes "not yours" (404) from a false 204. There's a test
that asserts the row actually survives, not merely that we returned 404.

The middleware now also puts the session id in context. logout-others is
defined by exclusion, and without knowing which session is ours the
safe-looking action deletes everything including the caller's — so it
refuses rather than guesses when the id is absent, and that refusal is
tested for non-deletion too.

audit_log.action is plain text with no CHECK, so the two new actions need no
migration (rule #36 checked, not assumed).

Codegen is real sqlc 1.31.1 via the container in `make generate` — docker is
present on this workstation even though Go and sqlc aren't — rather than the
hand-written .sql.go shortcut used in milestone #268.
2026-08-05 09:17:40 -04:00
bvandeusenandClaude Opus 5 cf0d37bf8e fix(discover): compare against a baseline run, not a hardcoded score — #2377
test-go / test (push) Successful in 56s
test-go / integration (push) Successful in 4m52s
TestSuggestArtists_UntaggedCandidateSurvivesAlongsideTagged asserted the
untagged candidate's score was 0.9 — the raw similarity value I'd seeded.
It's actually 1.61, because the pool score is signal-weighted by the seed
query: ln(1+signal) x similarity, and a liked seed carries signal 5, so
ln(6) x 0.9.

The assertion was testing the seeding arithmetic, which is a different
layer and not what the test is about. Rewritten to run the same request
twice — once with the tag term disabled, once enabled — and assert the
untagged candidate's score is IDENTICAL across both. That states the real
property (the blend leaves untagged candidates alone) without depending on
how the pool score is derived, so it survives future changes to seeding.

Added a sanity assertion that the TAGGED candidate's score did move, so
the comparison can't pass by both runs being trivially identical — the
same "a test that cannot fail" trap recorded for this milestone.

Exact-preservation at the arithmetic level is already covered where it
belongs, by TestApplyTagOverlap_UntaggedCandidateScoreIsUnchanged.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-02 23:45:48 -04:00
bvandeusenandClaude Opus 5 799dab029a feat(discover): rank suggestions by taste-tag overlap — #2377 (server)
test-go / test (push) Successful in 1m0s
test-go / integration (push) Failing after 4m55s
The payoff slice. Until now a candidate's only claim on a slot was "some
artist you play is adjacent to it in a similarity graph" — a fact that says
nothing about whether the music sounds like anything you like. Now the
candidate's own folksonomy tags (cached by slice 5) are compared against
the user's taste-profile tags, so the deck ranks on taste and can say WHY.

The blend is MULTIPLICATIVE — score × (1 + weight × overlap) — and that
choice carries the whole safety argument:

  - An untagged candidate has overlap 0, so its score is EXACTLY unchanged.
    Tag coverage is permanently partial (#2376); it must cost a candidate
    nothing, not sink it (rule #131).
  - Nothing can leapfrog on tags alone. An additive term with a large
    weight would let a near-zero-similarity artist outrank a strong match
    for sharing one popular tag, which reads as noise.
  - Weight 0 restores pure similarity order bit-for-bit, so the operator's
    knob has a real off position.

overlap = Σ(shared) candWeight × normalizedTasteWeight ÷ Σ(all) candWeight.
Normalizing the taste side by the user's strongest tag makes the score
comparable across users (taste weights accumulate with listening, so a
heavy listener's raw numbers dwarf a new user's while meaning the same
thing). Dividing by the candidate's own mass makes it comparable across
candidates, so a densely-tagged artist can't win on tag count alone.

Applied to the whole over-fetched pool BEFORE selectSuggestions, so the
rotation and diversity rules operate on blended scores — boosting only the
twelve already chosen by similarity would leave the re-ranking undone.

A query failure is returned, NOT degraded past. Graceful degradation is
for expected absence (no taste profile, no cached tags) and both are
handled explicitly as empty inputs; swallowing a real error would hide a
broken DB behind a subtly worse ranking that nothing reports.

Migration 0051 adds a FOURTH tuning scope rather than columns on
taste_tuning, because snooze_days lives here too and a snooze must never
be read as taste signal (#2374) — filing it under 'taste' would put it one
careless join from the leak that design forbids. Expanding
recommendation_tuning_audit's CHECK is in the same migration per rule #36,
and a test asserts the audit row lands, which is what would catch its
absence.

snooze_days moves out of a Go constant onto the tuning card (rule #25),
closing the deferral from #2374.

Tag-overlap tests use deliberately SKEWED fixtures: an evenly-matching pool
cannot exercise a re-ranking, since every candidate gets the same
multiplier and the order is unchanged whether the blend works or not.

Admin UI + client attribution follow in this batch — rule #27.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-02 20:31:12 -04:00
bvandeusenandClaude Opus 5 7315e37c15 fix(db): apply sqlc's actual output for candidate_artist_tags — #2376
test-go / test (push) Successful in 58s
test-go / integration (push) Successful in 4m53s
Three divergences in the hand-written generated file, all caught by
verify-generate on the first run. Two are sqlc rules I had wrong:

1. When a query's SELECT list exactly matches a table's columns in order,
   sqlc REUSES the model struct rather than emitting a bespoke Row type.
   So ListCandidateArtistTagsForMbids returns []CandidateArtistTag, and
   ListCandidateArtistTagsForMbidsRow should never have existed.

2. models.go is ordered by GO STRUCT NAME, not table name. Table order
   would put candidate_artist_tag_state before candidate_artist_tags;
   sqlc emits CandidateArtistTag before CandidateArtistTagState. The
   earlier slice-3 observation ("ordered by table name") was consistent
   with both orderings and so never discriminated — this case does.

3. sqlc smart-quotes a doubled '' inside a promoted comment into a
   typographic ”. Reworded the prose to say "the empty string" instead of
   encoding a mangling into the source.

Note the integration lane PASSED on the broken push while this failed.
That is #2380's lesson landing again, and the reason the check exists:
valid SQL executing against real Postgres proves nothing about whether
the committed Go matches its source.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-02 20:11:03 -04:00
bvandeusenandClaude Opus 5 4f9b083eec feat(discover): artist-tag cache for out-of-library candidates — #2376
test-go / test (push) Failing after 32s
test-go / integration (push) Successful in 4m50s
Migration 0050 adds candidate_artist_tags + candidate_artist_tag_state:
folksonomy tags for artists NOT in the library, which track_tags cannot
hold because it's FK'd to tracks(id) and a Discover candidate has no local
row. Slice 6 ranks against these; this slice only fills the cache.

The reuse the task claimed is real and verified: MusicBrainz's
fetchEntityTags(ctx, "artist", mbid, scale) already existed for the #1519
recording→artist fallback, so FetchArtistTags is a thin wrapper. Two
subtleties it does NOT inherit:

  - Weight scale is 1.0, not artistTagWeightFactor (0.6). That discount
    exists because FetchTrackTags uses artist tags as a *proxy* for a
    track's; here the artist IS the subject. Applying it would make these
    weights incomparable with track_tags — exactly the comparison slice 6
    depends on. Pinned by a test.
  - fetchEntityTags reports existing-but-untagged as (empty, nil) so the
    track path can fall through. There's no next level here, so empty
    becomes the terminal ErrNotFound; otherwise the enricher would settle
    a candidate as "enriched" with zero tags.

ArtistTagProvider is the split TrackTagProvider's own doc comment
anticipated ("e.g. artist-level tags"). Last.fm gains artist.getTopTags,
which returns the same toptags envelope, so the response type and
normalizer are reused unchanged.

Rather than write the merge-and-classify loop twice, extracted it from
EnrichTrack into runChain(). The ErrNotFound-vs-transient split is the
load-bearing part — those lead to opposite persistence decisions — so it
now has direct unit tests it never had while inlined.

Bookkeeping is a separate table, not columns, because the "providers had
nothing" outcome must be recordable for a candidate with zero tag rows,
and there is no per-candidate row to hang columns off (
artist_similarity_unmatched holds many rows per candidate). Absence of a
state row means "never processed", so a transient failure writes nothing
and stays eligible.

Two capacity realities are designed for, not papered over:
  - The pool is O(library artists x neighbours) and MusicBrainz allows
    ~1 req/s, so it can never drain in one pass. The eligibility query
    returns candidates in descending summed-similarity order, so the ones
    that can actually reach a deck are enriched first.
  - candidateBatch (50) is smaller than the track batch (200): tracks are
    finite and drain to completion, candidates are effectively unbounded
    and would otherwise starve the track arm forever.

GC sweeps both tables — the similarity feed churns, and a candidate that
joins the library has its tags in track_tags now. Tags swept before state
so a mid-sweep crash leaves a valid state, not a re-fetch loop.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-02 20:04:15 -04:00
bvandeusenandClaude Opus 5 86af79bd2f feat(discover): time-boxed suggestion snooze, server side — #2374
test-go / test (push) Successful in 1m20s
test-go / integration (push) Successful in 5m1s
Migration 0049 adds suggestion_snoozes(user_id, candidate_mbid,
candidate_name, snoozed_until), and SuggestArtistsForUser excludes rows
whose snooze hasn't expired.

This is NOT a dislike. Rule #101 forbids a "Not for me" / thumbs-down
UI; a snooze is the approved shape instead because it records no verdict
on the music, expires on its own (~90d), and never reaches the taste
profile. It's acquisition triage — "not right now" — so the filter sits
at the candidate stage rather than in the score, where it would become a
ranking signal by the back door.

Per-user throughout (rule #47): one household member parking a candidate
leaves everyone else's deck untouched.

candidate_name is denormalized because suggestions are out-of-library by
definition — there is no artists row to resolve a display name from, and
the un-snooze list has to show something. That list is why GET
/discover/snoozes exists at all: a parked candidate is by definition
absent from the deck, so without it the DELETE would be unreachable.

Also fixes a hole in the codegen check from #2380: `git diff` ignores
untracked paths, so a brand-new generated file would have passed it
silently. `git add -N` first. This commit is the first to add one.

Endpoints:
  POST   /api/discover/suggestions/{mbid}/snooze  (body: name, days)
  DELETE /api/discover/suggestions/{mbid}/snooze
  GET    /api/discover/snoozes

UI lands in slice 4 (#2375) before any of this merges — rule #27.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-01 22:51:51 -04:00
bvandeusenandClaude Opus 5 e006de5d4b fix(db): apply sqlc's actual output for SuggestArtistsForUser — #2380
test-go / test (push) Successful in 1m2s
test-go / integration (push) Successful in 4m55s
The new codegen check failed on its first run, against the slice-1 hand-edit,
which is precisely why it landed on its own commit.

What I got wrong: sqlc does not embed the leading `--` header block in the SQL
const. It strips those lines and promotes them to the generated method's Go doc
comment, gofmt-formatted — blank `//` separators around the indented list, tabs
for the indent. My hand-edit left the header inside the string AND left the
stale M5c doc comment sitting on the function, so the generated file described
behaviour the query no longer had.

Comments *inside* the statement body are kept as-is; only the header block moves.
Worth knowing before slices 5 and 6 add more queries.

Taken verbatim from the diff the check printed, which is the reason it prints
before asserting. Round-trip cost: one CI run, no guessing.

Note the integration lane passed on the previous push even with the wrong
generated file — the SQL text was valid and the signature was unchanged, so
executing it against real Postgres proved nothing about whether the committed
Go matched its source. That gap is exactly what #2380 closes.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-01 22:23:35 -04:00
bvandeusenandClaude Opus 5 b27029f674 feat(discover): rotate the suggestion deck daily + cap one seed's share — #2373
test-go / test (push) Successful in 28s
test-go / integration (push) Successful in 4m54s
Second half of the reported symptom: suggestions "show the same artists until
you request one". The ranking was `ORDER BY total_score DESC` with no
randomization and no seen-state, so the only things that could ever change the
deck were a candidate entering the library or the user filing a request. The
tail of the ranking was unreachable — requesting was literally the only lever.

No SQL change was needed. The query already takes a limit, so it over-fetches a
pool (4x the slots, capped at 60) and the selection moves to Go, where it is a
pure function of (pool, limit, day) — no DB, no clock — and therefore unit
testable in the fast lane instead of behind the integration gate.

Three rules. The best few by score always lead, so the strongest matches never
rotate out of sight (For You's head/tail shape). The remaining slots are drawn
by md5(mbid + day), the same daily-stable idiom the Home rows already use:
stable within a day so pull-to-refresh doesn't reshuffle, different tomorrow,
and no stored state. And a per-seed cap keeps roughly a quarter of the deck
attributable to any one seed artist, so twelve neighbours of a single artist
can't be the whole surface.

The cap is a preference, not a quota. A user whose pool hangs off one or two
seeds would otherwise get a three-card surface — worse than the monoculture
being avoided, and exactly the vanish-or-nothing shape rule #131 exists to
prevent — so a short deck tops up in score order from what the cap set aside.
This is also what keeps the existing Top12Cap integration test honest: its
30 candidates share one seed, and without the top-up it would return 3.

Eight unit tests, including one that had to be rewritten mid-change: the first
version asserted the cap against an evenly-spread pool, where the top-N is
already diverse and the assertion could not fail. It now uses a skewed pool
where one seed owns the entire top of the ranking, which is the only shape that
actually exercises a cap.

Dropped two //nolint:gosec directives added in passing — gosec isn't in
.golangci.yml, so they suppressed nothing and only implied a check that runs.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-01 12:56:42 -04:00
bvandeusenandClaude Opus 5 14aa22198f feat(discover): seed request suggestions from the taste profile — #2372
test-go / test (push) Successful in 29s
test-go / integration (push) Successful in 4m55s
The Discover request surface was the one recommendation surface still on its
M5c implementation from early May. #796's taste profile, #1488's taste_unheard
bucket and #1490's folksonomy enrichment all modernized in-library surfaces;
this one was never in scope for any of them, so it still projected raw likes +
plays through artist_similarity_unmatched.

Two defects fall out of that signal, `5*liked + Σexp(-age/halflife)` summed
over every play of the artist.

It is unbounded, and contribution is signal × similarity — so a handful of
heavily-played artists monopolize all twelve slots, and their share GROWS the
more the user listens. The surface entrenched harder the better it knew you,
which is exactly backwards and matches the reported "goes stale once it has a
strong signal of your taste".

It also counted every play_event with no was_skipped filter, so skipping an
artist repeatedly INCREASED its signal and pushed more of its neighbours at the
user. ListMostPlayedTracksForUser and the taste engine both filter skips; this
query was the odd one out.

Seeds now come from taste_profile_artists.weight, which the taste engine has
already engagement-graded, time-decayed and signed — an artist the user drifted
away from stops contributing instead of accumulating forever, and can even
contribute negatively. Tiered per rule #131 rather than hard-switched: tier 1 is
the profile, tier 2 is likes + completed plays for a user who has no profile
rows yet (new account, or before the first daily recompute), so the surface
never empties. The old unfiltered-play signal is gone, not kept behind a toggle.

The signal is also log-damped, so one artist cannot take every slot even when
its weight dwarfs the rest.

$2 stays wired to the tier-2 decay: it is genuinely still used there, and
dropping the parameter would have changed the generated signature.

sqlc's image is not on this workstation and the change preserves the query
signature exactly — same three params, same seven columns — so only the
embedded SQL const moves. Both copies are edited and verified byte-identical
rather than pulling a container onto the operator's machine; a malformed query
fails the integration lane loudly, which is the real check either way.

Four integration tests cover what changed: a taste weight alone seeds with no
like or play; tier 2 does not run alongside tier 1; a non-positive weight never
seeds (guarded by a second positive row, so an empty tier 1 can't make it pass
for the wrong reason); and skip-only history seeds nothing.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-01 12:45:34 -04:00
bvandeusenandClaude Opus 4.8 5749f48b4a feat(taste): device-class context conditioning — #1551
test-go / test (push) Successful in 45s
test-web / test (push) Successful in 52s
android / Build + lint + test (push) Successful in 4m23s
test-go / integration (push) Successful in 5m5s
Milestone #160 Opt 3b. Adds device class as a third context axis on top
of the #1531 time-of-day/weekday affinity: on the radio path, a candidate
is boosted when its artist concentrates in the current (daypart × weekday
× device) cell. Client-sent (client_id is opaque; no UA stored), so it's
captured going forward and applies to radio only (daily mixes are
cron-built with no device → stay device-agnostic).

Server:
- Migration 0048: play_events.device_class text NULL (no CHECK; normalized
  in Go — one whitelist entry per new client class, not a migration).
- events.go: eventRequest.device_class + normalizeDeviceClass (whitelist →
  mobile/web/…, else "other", empty → NULL); threaded through both
  RecordPlayStartedWithSource and RecordOfflinePlay into InsertPlayEvent.
- ListArtistContextPlayCountsForUser gains a current-device param; the cell
  FILTER adds AND ($2='' OR device_class=$2) — '' reproduces the #1531
  time-only behaviour exactly (used by mixes). SessionVector.DeviceClass
  carries it; the radio handler derives the current device from the user's
  latest play (GetLatestPlayDeviceClassForUser) — request-free proxy.
- No new tuning knob: device narrows the existing ContextAffinityScore
  (reuses context_time_weight).

Clients:
- web: play_started sends device_class 'web'.
- android: play_started + offline replay send 'mobile' (EventsWire +
  PlayOfflinePayload + MutationReplayer + PlayEventsReporter).

Test: LoadContextAffinity device-narrowing integration test (mobile vs web
artist separation; device-agnostic parity).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-14 12:47:59 -04:00
bvandeusenandClaude Opus 4.8 f0c08e7326 feat(taste): mood taste facet — #1534
test-go / test (push) Successful in 34s
test-web / test (push) Successful in 40s
test-go / integration (push) Successful in 4m44s
Milestone #160 Opt 2b (mood half of the era+mood option). A fourth taste
facet alongside artists + genre tags + eras: signed weights over canonical
mood buckets (melancholic / energetic / chill / …) derived from a track's
enriched folksonomy tags (#1490).

- internal/mood: shared vocabulary — Of(tags) maps folksonomy tags to
  canonical mood buckets (synonyms collapse). Imported by both the taste
  builder and the scorer so a track's mood is derived identically.
- Migration 0047: taste_profile_moods table + taste_tuning.mood_scale
  (DEFAULT 0.5).
- Build side (internal/taste): Config.MoodScale ([0,1] damper, mirrors
  EraScale); accumulate folds each play/like's mood buckets at
  base*MoodScale; persist atomic-replaces the mood rows.
- Scorer (internal/recommendation): TasteProfile gains a mood term
  (own tanh scale + additive 0.12 share, so it never weakens the existing
  signal when a track has no mood tags). Match now takes the candidate's
  mood buckets; loaded per candidate (ListTrackTagsForTracks → mood.Of) in
  the primary similarity loader only — the near-whole-library fallback
  pool passes nil (mood → 0) to avoid a full-library tag scan.
- Tuning lab: mood_scale threaded through recsettings + admin API + web
  card ("Mood weight" row) + Go/web tests.

Coverage is partial (grows with tag enrichment; richer once Last.fm is
keyed), so mood is a supplement — neutral for tracks with no mood tags.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-14 10:32:41 -04:00
bvandeusenandClaude Opus 4.8 199fec2058 feat(taste): household co-play similarity — #1533
test-go / test (push) Successful in 29s
test-go / integration (push) Successful in 4m48s
Milestone #160 Opt 5. A collaborative candidate arm: tracks by artists
co-played across the instance with the seed's artist.

Minstrel is a single shared-library, multi-user server (no per-user
library ACL — verified: no owner/share/group model), so the "household"
is the whole instance's user set; the rule #47 scoping is satisfied by
the shared-library boundary. Single-user servers produce no edges.

- No migration: source='user_cooccurrence' was pre-whitelisted in the
  0009 similarity CHECK from day one.
- internal/db/queries/coplay.sql: Delete + Insert artist co-play edges.
  Score = Jaccard of the two artists' distinct-player sets (controls for
  globally-popular artists); >= 2 co-players AND Jaccard >= floor kept
  (the floor also self-limits hub artists). Completed plays, 365d window.
- internal/coplay: periodic worker (6h) that atomic-replaces the
  user_cooccurrence edge set from play_events — pure local SQL, no
  external calls. Wired in main.go alongside the similarity worker.
- LoadRadioCandidatesV2: new coplay_artists arm (source='user_cooccurrence',
  seed-artist based, 0.5 damp like similar_artists) + $11 limit;
  CandidateSourceLimits.UserCoplay (default 20, For-You 40).
- Integration tests: perfect-overlap Jaccard=1.0 edge + single-user
  empty-set gate.

Device axis and AcousticBrainz (Opt 4) are separately tracked; this
closes the milestone-#160 sequential options.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-14 10:07:19 -04:00
bvandeusenandClaude Opus 4.8 65dd132b3d feat(taste): time-of-day / weekday context conditioning — #1531
test-go / test (push) Successful in 35s
test-web / test (push) Successful in 42s
test-go / integration (push) Successful in 4m46s
Milestone #160 Opt 3 (temporal half). A new additive scoring term that
boosts a candidate when its artist's play history concentrates in the
CURRENT daypart × weekday-type cell, in the user's local timezone.

- Migration 0046: recommendation_weight_profiles.context_time_weight
  (per-profile scoring weight, DEFAULT 1.0).
- Query ListArtistContextPlayCountsForUser: per-artist completed-play
  counts split by the current cell (daypart night[22,5)/morning[5,12)/
  afternoon[12,17)/evening[17,22) × weekday-vs-weekend) via
  started_at AT TIME ZONE users.timezone; 365-day window, skips excluded.
- internal/recommendation/context.go: LoadContextAffinity computes each
  artist's shrunk cell-share minus the user's baseline share, clamped to
  [-1,1]; sparse artists shrink toward baseline (pseudo-count 5), unknown
  artists → 0 (cold-start neutral).
- Score() gains context_affinity_score · ContextTimeWeight; both
  candidate loaders set it per candidate.
- Tuning lab: ContextTimeWeight threaded through recsettings + admin API
  + web card ("Time-of-day weight" row) + Go/web tests. Shipped 1.0 both
  profiles (uniform start, re-bakeable).

Device-class axis deferred to #1551 (needs a client_id → device-class
mapping that doesn't exist yet).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-14 09:31:43 -04:00
bvandeusenandClaude Opus 4.8 40384cc05e feat(taste): era/decade taste facet — #1530
test-go / test (push) Successful in 34s
test-web / test (push) Successful in 41s
test-go / integration (push) Successful in 4m40s
Milestone #160 Opt 2 (era half). A third taste facet alongside artists
+ genre tags: signed weights over decade buckets ("1990s") derived from
albums.release_date, rebuilt daily and scored into the taste match.

- Migration 0045: taste_profile_eras table (mirrors taste_profile_tags)
  + taste_tuning.era_scale column (DEFAULT 0.5).
- Build side (internal/taste): Config.EraScale ([0,1] damper, mirrors
  EnrichedTagScale), accumulate folds each play/like's decade at
  base*EraScale, persist atomic-replaces the era rows.
- Scorer (internal/recommendation): TasteProfile gains an era term (own
  tanh scale + additive 0.15 share so it never weakens the existing
  artist/tag signal when a track is undated); candidate queries return
  album release_date; decadeOf mirrors the builder helper.
- Tuning lab: era_scale threaded through recsettings + admin API + web
  card (auto-renders the new row) + Go/web tests.

Mood facet deferred to #1534 (partial enrichment coverage + needs
candidate-side enriched-tag loading).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-14 09:01:00 -04:00
bvandeusenandClaude Opus 4.8 2b3be8311a feat(tuning): expose EnrichedTagScale in the tuning lab (#1520)
test-go / test (push) Successful in 35s
test-web / test (push) Successful in 41s
test-go / integration (push) Successful in 4m45s
Promote the enriched-tag weight (#1490) from a taste.Config default into
the DB-backed tuning lab so operators can dial how much folksonomy tags
count vs raw ID3 genre (rule #25).

- Migration 0044: taste_tuning.enriched_tag_scale (DEFAULT 0.5, backfills
  the existing row).
- recsettings: TasteTuning gains the field; seeded/read/updated through
  reconcile + persistTaste; applyTastePatch validates it to [0,1]
  (generic non-half-life clamp) and diffTaste audits it; TasteConfig maps
  it into the profile build.
- API: tasteTuningResp exposes enriched_tag_scale.
- Web tuning card: a data-driven "Enriched tag weight" knob (0 = genre
  only). Tests: recsettings persist+range, web fixture field.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-14 07:51:36 -04:00
bvandeusenandClaude Opus 4.8 c30511e71b feat(tags): MusicBrainz artist-MBID tag fallback (#1519)
test-go / test (push) Successful in 30s
test-go / integration (push) Successful in 4m44s
Widen keyless coverage: when a track's recording is untagged or has no
recording MBID, fall back to the artist's tags (/ws/2/artist/{mbid}
?inc=tags), down-weighted 0.6 as a coarser signal. Recording tags still
win outright when present.

- ListTracksMissingTags returns a.mbid AS artist_mbid; TrackRef gains
  ArtistMBID; the enricher threads it through.
- MB provider: recording-first, artist-fallback via a shared
  fetchEntityTags helper. A transient error at the recording step is
  returned (retry) rather than masked by the fallback.

Enricher, registry, and settings are untouched — the pluggable design
absorbs the wider lookup. Tests cover fallback-when-untagged,
artist-only-when-no-recording-MBID, and recording-preferred.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-14 07:43:22 -04:00
bvandeusenandClaude Opus 4.8 96c2eb6afb fix(dbtest): reset tag-sources settings between tests (#1490)
Add tag_provider_settings to the truncation list and reset
tag_sources_meta.current_version to 1 in ResetDB, mirroring the cover-art
settings reset. Without it the migration-seeded musicbrainz/lastfm rows
leaked across tests and desynced the enabled-set signature, so a key-only
PATCH spuriously reported version_bumped=true
(TestAdminUpdateTagSource_KeyOnlyDoesNotBump).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-13 22:32:51 -04:00
bvandeusenandClaude Opus 4.8 cce928e584 feat(api): admin tag-sources endpoints (#1490 Step 4 backend)
test-go / test (push) Successful in 29s
test-go / integration (push) Failing after 4m43s
Expose the tag-enrichment provider settings over the admin API, mirroring
the cover-sources surface so a Last.fm key can be pasted and sources
toggled from the web admin UI (rules #25/#27).

- GET  /api/admin/tag-sources                 — list providers + version
- PATCH/api/admin/tag-sources/{id}            — enable / set api_key
- POST /api/admin/tag-sources/{id}/test       — test connection
- POST /api/admin/tag-sources/research        — bump version, re-open
                                                 settled rows for re-enrich
- Thread tags.SettingsService through server.New (struct field, like
  RecSettings) → Router → api.Mount → handlers.tagSettings; main.go sets
  srv.TagSettings.

Handler tests mirror admin_cover_sources_test (list / flip-bumps-version /
key-only-no-bump / unknown-404 / non-admin-403 / not-testable-ok-false),
integration-tier (skip without MINSTREL_TEST_DATABASE_URL).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-13 22:24:28 -04:00
bvandeusenandClaude Opus 4.8 7d18a3c808 feat(taste): fold enriched folksonomy tags into the profile (#1490 Step 3)
test-go / test (push) Successful in 30s
test-go / integration (push) Successful in 4m43s
The taste recompute's tag facet now unions the cached track_tags
(MusicBrainz/Last.fm folksonomy tags) alongside raw ID3 genre, so a coarse
"Rock" gains "post-punk / shoegaze / melancholic".

- taste_profile.sql: ListPlayEngagementInputsForUser +
  ListLikedTrackTasteInputsForUser now return track_id to key the
  enriched-tag lookup.
- accumulate(): for each play, fold its track's enriched tags weighted by
  engagement × tag.weight × EnrichedTagScale; for each liked track, by the
  tag-like bonus × tag.weight × scale. A track with no cached tags
  contributes genre only (graceful).
- New Config.EnrichedTagScale (default 0.5) — enriched tags augment the
  ID3 signal without swamping it; 0 = genre-only. Flows through
  recsettings.TasteConfig() (starts from DefaultConfig). Promoting it into
  the admin tuning lab is a small follow-up.

Unit-tested the pure foldEnrichedTags helper (overlap accumulation +
scale=0 disable).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-13 22:09:31 -04:00
bvandeusenandClaude Opus 4.8 c34753f5b0 feat(tags): wire tag-enrichment worker at startup (#1490 wiring)
Construct the tag SettingsService + Enricher at boot (mirroring coverart:
reconcile providers, bump the sources version if the provider set changed
to re-open settled rows), then run a standalone background Worker that
drains tracks needing folksonomy tags on a periodic tick.

Standalone (not threaded through the file-scan chain like cover art)
because tag lookups need only DB fields — recording MBID / artist / title
— so it mirrors the ListenBrainz similarity worker instead: an initial
drain shortly after boot, then every 30 min, up to 200 tracks per tick.
MusicBrainz's 1 req/s ceiling is the real throttle.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-13 22:09:31 -04:00
bvandeusenandClaude Opus 4.8 fbfd5550ff feat(tags): folksonomy tag enricher — pluggable provider chain (#1490 Step 2)
test-go / test (push) Successful in 30s
test-go / integration (push) Successful in 4m46s
Milestone #160 Option 1, Step 2. New internal/tags package that enriches
the taste profile's tag facet beyond raw ID3 genre, built so adding a
source later is "implement TrackTagProvider + Register()" — no enricher,
settings, or schema change (operator directive).

Mirrors the internal/coverart pattern:
- Provider interface + package registry (Register/AllProviders/ByID);
  TrackTagProvider fetch capability + TestableProvider for the admin test.
- DB-backed SettingsService over new tag_provider_settings +
  tag_sources_meta (migration 0043) — enable/key/version, boot
  reconciliation, and a provider-hash bump that re-opens 'none' rows when
  the compiled-in provider set changes.
- Slim self-contained httpClient (rate-limit + retry + User-Agent), kept
  local so tag enrichment never depends on coverart internals.

Providers:
- MusicBrainz: keyless, default-ON, recording tags by MBID (rule #26 baseline).
- Last.fm: keyed, default-OFF, track.getTopTags by artist+track — opt-in
  once a key is supplied.

Enricher uses MERGE semantics (differs from coverart's first-success-wins
for a single image): unions tags across every enabled provider, caps to
top-K by weight, and stamps tag_source musicbrainz|lastfm|mixed|none.
Writes are transactional (atomic replace of track_tags).

Unit-tested without a DB: registry mechanics, provider JSON parsing +
weight normalization via httptest, and the pure merge/top-K/source-label
helpers. Wiring (startup + on-scan), integration tests, and the taste
union (Step 3) + Settings UI (Step 4) come next.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-13 21:43:58 -04:00
bvandeusenandClaude Opus 4.8 c1d143cf4a feat(home): Songs-like → dedicated row + wider spread (#1491)
test-go / test (push) Successful in 33s
test-web / test (push) Successful in 43s
android / Build + lint + test (push) Failing after 1m29s
test-go / integration (push) Successful in 4m42s
Promote the best-performing surface ("Songs like {artist}", ~8% skip /
~86% completion) out of the shared Playlists carousel into its own Home
row on both Android and web, and widen the daily build from 3 to 6 mixes
so the dedicated row shows a wider spread.

Server (internal/playlists):
- PickSeedArtists candidate pool 5 → 12; pickSeedArtistsForDay now takes
  songsLikeSeedCount (6) instead of a hardcoded 3. Graceful degradation
  and daily rotation preserved.

Android (HomeScreen.kt):
- New songsLikeSection + buildSongsLikeRow; PlaylistsRow takes a title so
  it renders both the "Playlists" and "Songs like…" rows. buildOnlineRow
  / orderedRealPlaylists no longer reserve the 3 songs-like slots.
  Offline shows cached mixes (available-first), hides the row when none.

Web (+page.svelte):
- Dedicated "Songs like…" row from songsLikeRow; dropped the 3-slot cap
  and removed songs-like from the Playlists carousel.

Tests: seed_selection_test.go, BuildPlaylistsRowTest.kt, page.test.ts.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-13 20:41:08 -04:00
bvandeusen cb0af5efd3 fix(dbq): commit the rest of the 0042 regen (Track model + embedders)
test-go / test (push) Successful in 30s
test-go / integration (push) Successful in 4m37s
The previous commit staged only track_tags.sql.go and left the rest of
the sqlc regen uncommitted, so HEAD referenced TrackTag / the new
tracks.tag_source columns without their definitions — a broken tree.

Adding tracks.tag_source + tag_sources_version to the tracks table
regenerated every generated file that returns/embeds the Track model
(models.go, tracks/events/history/likes/recommendation). Commit them all
together so dev HEAD compiles.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-13 18:47:34 -04:00
bvandeusen 20a76f4b39 feat(taste): track_tags schema + enrichment queries (Opt 1 foundation)
test-go / test (push) Failing after 10s
test-go / integration (push) Has been cancelled
First step of taste-profile fidelity via metadata enrichment (milestone
#160, task #1490) — no ML sidecar, operator's constraint.

The taste profile's tag facet is built purely from raw ID3 tracks.genre
(splitGenres in internal/taste/profile.go). This lands the data layer for
enriching it with track-level folksonomy tags:

- track_tags(track_id, tag, weight) — a global cache of style/mood tags,
  top-K per track, weight = normalized folksonomy strength [0,1].
- tracks.tag_source / tag_sources_version — versioned enrichment
  bookkeeping mirroring artists.artist_art_source (NULL = eligible,
  provider name = found, 'none' = settled, version bump = re-process).
- Queries: ListTracksMissingTags (batch drainer), DeleteTrackTags +
  InsertTrackTag (atomic per-track replace), SetTrackTagSource, and
  ListPlayed/LikedTrackTagsForUser for the recompute to union enriched
  tags into the tag facet alongside genre.

No consumer yet — the enricher (MusicBrainz + Last.fm providers,
track-level) and the taste-recompute integration land next.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-13 18:46:49 -04:00
bvandeusen 7226dab9ff feat(discover): taste-targeted novelty bucket + rebalance toward discovery
test-go / test (push) Successful in 30s
test-go / integration (push) Successful in 4m38s
The 2-week metrics review found Discover beating the manual baseline on
skip rate — which for a discovery surface means it plays it safe. On a
single-user server it's effectively dormant + crude-random, and the
per-user taste profile (taste_profile_tags, #796) went unused (#1254 gap).

Add a fourth Discover candidate bucket, ListTasteUnheardTracksForDiscover:
unheard / non-liked / non-quarantined tracks ranked by summed taste-tag
weight over tracks.genre (split like the radio tag_overlap arm), md5
tiebreak. Its picks are stamped pick_kind = 'taste_unheard' (migration
0041 widens the CHECK on playlist_tracks + play_events, rule #36).

Rebalance the slot allocation 40/30/30 → taste_unheard 35 / dormant 30 /
cross_user 20 / random 15, and lead the interleave with taste_unheard so
a track shared with another bucket keeps the taste stamp and the
targeted-novelty arm stays measurable. Metrics label "Taste-matched" +
order entry added to the single server-side pickKindLabels map, so web
and Android surface the new breakdown row with no client change.

Cold start (empty taste_profile_tags) yields an empty taste bucket that
redistributes to the survivors, so Discover still fills.

Scribe #1488. Companion review outcomes: Songs-like starvation already
fixed (#1255); For You v2 ratified as-is (fresh-injection cost disproven).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-07-13 18:16:04 -04:00
bvandeusenandClaude Fable 5 9ad4343c76 feat(tuning): weekly trend view — per-surface series + knob-turn markers
test-go / integration (push) Successful in 4m44s
test-go / test (push) Successful in 33s
test-web / test (push) Failing after 38s
The verify half of the tune→verify loop (#1251), on the same admin
Tuning page as the knobs:

- RecommendationWeeklyTrends: weekly per-source outcomes aggregated
  across all users (the knobs are global, so judging a turn needs
  global outcomes — rows carry rates only, no track/user identity),
  with a taste-hit count per bucket: plays whose track's artist has a
  positive weight in the player's current taste profile. That's the
  "cheap recompute" reading — retroactive over the whole window, at
  the cost of profile drift.
- GET /api/admin/recommendation-trends?weeks=N (default 12, cap 52):
  per-family weekly series (skip rate, sample-weighted completion,
  taste-hit rate) plus the tuning-audit markers inside the window.
- Web: sparkline table under the tuning cards — skip rate per week on
  a shared axis with dashed ticks at knob turns, latest-week columns,
  window taste-hit rate, low-volume rows dimmed as anecdote, and a
  plain-text list of the window's tuning changes.

Also fixes the revive unused-parameter lint on the tuning GET handler
that failed CI run 1903 on the previous commit.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TsF3cNoKrqCYsU78cXC8U6
2026-07-03 09:29:33 -04:00